Sound not working, gentoo laptop [SOLVED]

[Timotej]

Hi, I'm new to linux and decided to install Gentoo couple of months ago, kinda made it through most of the problems, except the one that I have no clue what to do about and it is that I have no sound, so I would be really glad if someone would help, there's some info below, if there's anything else needed I'll post it right away.

Output of lspci | grep -i audio:

[guitou]

Hello.

Looks like you build your sound devices as modules. Then you should ensure proper module is loaded first and you might hopefully get sound then.

++
Gi)

[Timotej]

So, should I build them in a different way (in-kernel if I understand correctly) or leave it that way and load the proper module (which is I guess snd_hda_intel?) ? Also, how do i load a module? I mean, I already tried modprobe snd_hda_intel, but nothing happens...

[krinn]

Timotej, you should have just mark all of them as module to let dev manager pickup the right one for you.

If we assume your card is using the realtek one, and that the good one is at least usable, then something other is going on.
And the answer should be in your dmesg so.

[Timotej]

Ok, so now all of them are marked as modules, and i rebuilt the kernel as described here (https://wiki.gentoo.org/wiki/Kernel/Rebuild). While rebooting, as seen in dmesg, this happened:

[krinn]

the typical unknown symbol comes from a module that was built using some other modules or dependencies and options
and its deps and options has been change.

and you can easy do that:
- build module cxx and cxx use kernel option ckk, kernel provide ckk
- rebuild cxx and a new kernel with ckk support disable
new cxx doesn't need ckk, old cxx still need ckk, your kernel no more provide ckk : user install new kernel (without ckk support) and user forget to install modules, old cxx will be use, and old cxx will complain that symbols from ckk are missing.

you can also do it because of the newer kernel:
- build a new kernel with ckk support, build module cxx with ckk support
- install cxx but forget (or fail) to install new kernel
now cxx is trying to use ckk with the old kernel that doesn't have ckk support.

to sumup, it mean you need to rebuild kernel and modules and make sure they are both install (module and kernel), and it's as easy as forget to mount /boot (so new kernel gets install in directory /boot of your / partition and not in the /boot partition), or typo in kernel (like booting /boot/vmlinuz and user copy the new kernel as /boot/vmlinux).
A good way to check your kernel rebuild was fine: check your kernel build version with uname -a
Linux beleg 3.18.30 #4 (that's the #4 that you care about)
once you have build and install a kernel uname -a should output an increase build version (logically #5 or more, but no more #4)

[NeddySeagoon]

Timotej,

Kernel related Unknown symbol errocrs usually come from running a kernel and modules from different builds of the same kernel.
Sometimes the kernel build system gets confused and does not rebuild things it needs to. Other times the user makes an error, like not mounting boot for the kernel install.
That means the old kernel is used with the new modules.

To sort this out, rebuild the kernel starting with

[Martux]

I don't know if this is helpful to you, but I am having the following issue with a hda-intel card: If I suspend the laptop, the sound device is not recognized anymore. Also, if I let powertop regulate th energy saving for hda-intel, after suspend it's gone. So far the only "fix" I found is to dual boot into windows. After that the sound works again. Also try if your laptop has a hotkey for enabling/disabling the sound device.
_________________
"Coincidence is God's way of remaining anonymous."
Albert Einstein
"The road to success is always under construction"

[Timotej]

I rebuilt the kernel again, writing these commands:

[Martux]

Well, I am not exactly sure if "make install" also works with grub2 (still on grub legacy because of hassle-freeness).
If you want to make it 100% sure, do:

[Timotej]

Ok, so I tried again with the following procedure